Vertical tubular boiler.



No. 767,655. V PATENTED AUG. 16-, 1904.

I w. NORRIS.

VERTICAL TUBULAR BOILER.

' APPLICATION FILED JULY 12, 1902.

N0 MODEL.

; III! ZZtfnepfl$= v I In van fart U ITED {STATES Patented August 16, 1904.

PATENT OFFICE.

W'ILLIAM NORRIS, OF PRESTON, ENGLAND, ASSIGNOR TO T, OOULTHARD & COMPANY, LIMITED, OF PRESTON, ENGLAND.

VERTICAL TUBULAR BOILER.

SPECIFICATION forming part of Letters Patent No. 767,655, dated August 16, 1904.

- Application filed July 12,1902.

To (Li/Z whom it may concern:

and Ireland, residing at Cooper Road, Preston, in the county of Lancaster, England, have invented certain new and useful lmprovem ents in Vertical Tubular Boilersand the Fittings for the Same, (for which I have made application for Letters Patent in Great Britain, No. 5,607, dated the 6th of March, 1902,) of which the following is a specification.

This invention relates to improvements in connection with .tubulous boilers or steamgenerators of the vertical type of construction, the object being to provide such a form of feeding and a method of mounting the firebars within the boiler as will admit of a shell or cylindrical or other casing being employed wherein is no lower or usual opening for the fire doors or grate and for feeding the fuel onto such fire-grate.

By means of my improved method of construction I am enabled to dispense with the usual fire-door in the lower drum or lower portion of the boiler, and thus to secure a form of boiler of a more uniform and easily,

\ tor-car use or for other steam-generation pur- Serial No. 115,267. (No model.)

7 fire-chamber connection with fuel. The tube is fitted with a removable plug or stopper Z).- I prefer to makethe smoke-box e of my boiler in the form of acircular hood-like cover to the boiler into which the upper ends of the fire-tubes may open, while the central or enlarged feeding-tube b I carry through this hood. I make the outer surface of the hood or cover to form the receptacle or hopper (Z for fuel-supply, and forthis purpose I prefer to make the surface of the cover sloping or conical. The uptake or chimney f I secure to one portion of the hood or to the side of boiler-shell, as may be most convenient. By this arrangement of central firing I insure that the fuel shall be delivered onto the center of the fire-grate g, and I am also enabled to carry the waterjacket or lower portion 72 of the boiler entirely and uninterruptedly around the fire-box c. The fire bars or grates g I prefer to mount upon pivots p or hinge-like carriers, so that when they need cleaning or clinkering they can be readily swung down or lowered by handles, such as a, into a position where they can be operated upon from the lower ash-pit or damper doors arranged at the lower end of the shell of the boiler. I find it convenient to form these ash-pit doors as inclined members i, with inner hinges or pivots is, which admit of the doors being moved into an open position, when the hinged fire-bars 9 may be able to fall for discharging their ashes or for clean ing or examination purposes. The damper-frame Z I attach to the ash-pit, providing ordinary connections and means for regulating the damper to suit any requirement for steam-producing purposes.

The base of the boiler I modify to suit the position or frame 'upon which it is to be mounted, and the method of constructing the shell I also vary to suit the sizes of plates that are necessary for the particular type of boiler which is to be constructed.

I do not limit the application of my invention to any special arrangement of vertical hopper or to any particular method of mounting the movable fire grate or bars within the lower portion of the boiler or its fire-box; but I modify the system of construction to suit the size of boiler that is to be produced and the position on which it is to be employed.

Having now particularly described my invention, what 1 claim as new, and desire to secure by Letters Patent, is-

1. In a vertical tubular boiler having a shell with no fire-door opening and a central feeding-tube passing from the fire-box to the smoke-box end of the shell, the combination of a grate consisting of two flat semicircular grates g hinged on their diameters and provided at their circumferential edges with handles 92 for lowering the grates at the said edges for clinkering purposes, substantially as hereinbefore described.

2. In a steam-boiler, in combination, a shell or casing having its vertical walls continuous, that is without a fire-door opening therein, a central feeding-tube passing through-the water-space from the fire-box to the smokeboX end of the shell, a smoke-box having a depressed top forming a hopper leading to the tube, a grate consisting of two semicircular grates hinged on their diameters, and an ashpit inclosing the lower part of the shell below the grate and provided with hinged doors and a damper substantially as hereinbefore described.

In witness whereof I have hereunto set my hand in presence of two witnesses.

WILLIAM NORRIS Witnesses GEORGE HODGSON, W. H. HAMrsoN. 

